org.apache.carbondata.store

Interface CarbonStore

All Superinterfaces:

AutoCloseable, Closeable

@InterfaceAudience.User
 @InterfaceStability.Unstable
public interface CarbonStore
extends Closeable

User can use CarbonStore to query data

Method Summary

Modifier and Type	Method and Description
Iterator<org.apache.carbondata.core.datastore.row.CarbonRow>	scan(org.apache.carbondata.core.metadata.AbsoluteTableIdentifier tableIdentifier, String[] projectColumns) Scan query on the data in the table path
Iterator<org.apache.carbondata.core.datastore.row.CarbonRow>	scan(org.apache.carbondata.core.metadata.AbsoluteTableIdentifier tableIdentifier, String[] projectColumns, org.apache.carbondata.core.scan.expression.Expression filter) Scan query with filter, on the data in the table path
Iterator<org.apache.carbondata.core.datastore.row.CarbonRow>	sql(String sqlString) SQL query, table should be created before calling this function

Methods inherited from interface java.io.Closeable

close

Method Detail

scan

Iterator<org.apache.carbondata.core.datastore.row.CarbonRow> scan(org.apache.carbondata.core.metadata.AbsoluteTableIdentifier tableIdentifier,
                                                                  String[] projectColumns)
                                                           throws IOException

Scan query on the data in the table path

Parameters:

path - table path

projectColumns - column names to read

Returns:

rows

Throws:

IOException - if unable to read files in table path

scan

Iterator<org.apache.carbondata.core.datastore.row.CarbonRow> scan(org.apache.carbondata.core.metadata.AbsoluteTableIdentifier tableIdentifier,
                                                                  String[] projectColumns,
                                                                  org.apache.carbondata.core.scan.expression.Expression filter)
                                                           throws IOException

Scan query with filter, on the data in the table path

Parameters:

path - table path

projectColumns - column names to read

filter - filter condition, can be null

Returns:

rows that satisfy filter condition

Throws:

IOException - if unable to read files in table path

sql

Iterator<org.apache.carbondata.core.datastore.row.CarbonRow> sql(String sqlString)
                                                          throws IOException

SQL query, table should be created before calling this function

Parameters:

sqlString - SQL statement

Returns:

rows

Throws:

IOException - if unable to read files in table path